Find the wrong number in the given series.Â
6, 12, 21, 36, 56, 81
6, 12, 21, 36, 56, 81
$$12-6=6$$
$$21-12=9$$
$$36-21=15$$
$$56-36=20$$
$$81-56=25$$
so wrong term is first two it should be
$$11-6=5$$
$$21-11=10$$
so wrong term is 12
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